Multi-hole probe: A Review and a New Take to Improve Accuracy

This study reviews and addresses long-standing challenges associated with the multi-hole probe (MHP) technique by introducing a novel configuration. The key innovation involves geometric modifications to the centre port, enabling direct measurements of both total and static pressures. This new configuration has been experimentally validated in a jet calibrator and in bluff body wake in a wind tunnel, demonstrating a two-order-of-magnitude improvement in total pressure reading accuracy compared to a traditional MHP. The in-house uncertainty analysis aligns with the findings from existing literature, confirming the enhanced precision of the new MHP design. The innovative MHP configuration maintains the simplicity of traditional probes and the comparability with existing infrastructure and hence replace existing MHP without added complexity. The performance advancement holds substantial potential for applications requiring high precision and reliability by significantly reducing measurement uncertainty and improving accuracy.